number_tree: print out account tree, given a DID

also, append tree to hangup alert when NRD recv
number_tree: add some diagnostic info when numbers aren't found to the system_alert
KAZOO-1574: cowboy requires ranch, if crossbar was not started prior to fax then the fax whapps would fail
3.0: when guessing the endpoint type only assume it is a sip device if there is a non-empty sip property
3.0: get the hold media from the referer
KAZOO-1413: quick ticky/formatting updates
KAZOO-1413: more formatting/tickies
KAZOO-1413: add ability to query API for system-wide registration counts

/v1/registrations/count - requires client to be superduper admin
KAZOO-1413: updating formatting
KAZOO-1413: add support to query registration counts only
KAZOO-1413: add AMQP fields for count-only queries
KAZOO-1413: clean up wh_json:foldl to strip undefined values from the json object
KAZOO-1413: remove from system_admin_mods and return data as json to be consistant with other APIs
Merge pull request #137 from 2600hz/KAZOO-1413

Kazoo 1413
KAZOO-1560 change cdr listener to shared queue
KAZOO-1560 change cdr publisher behavior
KAZOO-1560 ensure callmanager node name is set on originate
KAZOO-1560: make this optional, see note in source
Merge pull request #131 from 2600hz/number_tree

Number tree
KAZOO-1213: make adding/removing FreeSWITCH ndoes persistent for the current node